Maintenance Menu; Sl - Set Output To X Ma; Cl - Calibration Of Output Signal - Dräger PEX 3000 Gebrauchsanweisung

Maintenance Menu

 To enter the maintenance menu press key ▼ for more than 3 seconds until the
display shows "SL" and the point on the right bottom flashes to indicate the
maintenance mode.
SL – Set Output to x mA
By means of this function the transmitter's output signals can be set to certain
constant values.
This function can activate alarm conditions at controller unit!
 Navigate by means of keys ▲ or ▼ until the display shows SL ("Set Loop") and
press keys (▲+▼) to enter.
— The signal output of the transmitter is set to 4 mA, the display shows "04".
 By means of the keys ▲ or▼ the signal output can be adjusted between 1 and
22 mA in steps of 1 mA. Pressing the keys for longer activates a repeat function.
 Press keys (▲+▼) to terminate this function. The display shows SL again.
 Press key ▲ to step back into measurement mode.
CL – Calibration of Output Signal
By means of this function the signal output of the transmitter can be adjusted such
that a current of 4 mA corresponds to 0 %LEL and a current of 20 mA corresponds
to 100 %LEL or 10 %LEL.
Generally the output signal can be measured at the controller side as voltage drop
across the input resistance, if not the 4 to 20 mA-loop has to be interrupted to install
an amp meter fort his purpose.
If the current loop is interrupted for this purpose the explosion protection is not
ensured!
 Navigate by means of keys ▲ or ▼ until the display shows CL ("Calibrate Loop").
 Press keys (▲+▼) to adjust the lower reference point, the display shows "04"
corresponding to 4 mA.
 Measure the current by means of the amp meter.
 By means of the keys ▲ or ▼ adjust the signal output such that the amp meter
reads a current of 4 mA as accurate as possible (between 3.95 toand 4.05 mA).
 Press keys (▲+▼). By this the lower reference point is saved and the menu
switches over to the upper reference point. The display shows "20"
corresponding to 20 mA.
 Measure the current by means of the amp meter.
 By means of the keys ▲ or ▼ adjust the signal output such that the amp meter
reads a current of 20 mA as accurate as possible (between 19.95 and to
20.05 mA). Pressing the keys for longer activates a repeat function.
 Press keys (▲+▼) to save the upper reference point and terminate this function.
The display shows CL again.
 Press key ▲ twice to step back into measurement mode.
NOTICE
WARNING
Maintenance Menu
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